Hi John,
        I have been tracking your progress on the EC2.  One thing about using shielded cables.  Both ends need to be grounded and do not use the shield as a conductor for any function.  Data running in adjacent cables can be corrupted by currents in cables next      to them.  If the shields are not grounded at both ends you have created an antenna.  Good luck.

 

Joe;

 

Best practice is to ground wire shield at only one end.  Grounding both ends results in multiple ground paths, and the potential for “ground loops”; slight differences in ground potential.  I’m not sure about your concern about the antenna effect; whatever minute signals picked up simple go to ground.

 

Another point about the shielded wires to the EC2 or EM2 – it is generally only an issue where there is significant distance between computer module and program module (EC2) or display (EM2); as likely happens in canard style aircraft.  (I think mainly this concerns the EM2).  I had some problems with the EM2 which where solved by Tracy adding a capacitor (filter) in the display module, and by me getting the display wiring bundle a little further away from the injector and ignition power leads.

 

The injector and ignition power leads are very “noisy”, especially the ignition leads.  This noise spreads through the entire power distribution system as I have measured with an oscilloscope.  Not necessarily an issue, but can be quieted down by adding a filter (large capacitor between power lead and ground), preferably near the coil or injector end of the lead.

 

FWIW,

 

Al